chromeos: Migrate SignOut and RequestRestartForUpdate to mojo interface

ash/common/system/user/user_view.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/common/system/user/user_view.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/multi_profile_uma.h"
 #include "ash/common/popup_message.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shell_delegate.h"
 #include "ash/common/system/tray/system_tray.h"
+#include "ash/common/system/tray/system_tray_controller.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/common/system/tray/tray_popup_label_button.h"
 #include "ash/common/system/tray/tray_popup_label_button_border.h"
 #include "ash/common/system/tray/tray_popup_utils.h"
 #include "ash/common/system/user/button_from_view.h"
 #include "ash/common/system/user/login_status.h"
 #include "ash/common/system/user/rounded_image_view.h"
 #include "ash/common/system/user/user_card_view.h"
 #include "ash/common/wm_lookup.h"
@@ skipping 348 matching lines @@
     logout_button_->SetBoundsRect(logout_area);
   } else {
     user_card_view_->SetBoundsRect(contents_area);
   }
 }
 
 void UserView::ButtonPressed(views::Button* sender, const ui::Event& event) {
   if (sender == logout_button_) {
     WmShell::Get()->RecordUserMetricsAction(UMA_STATUS_AREA_SIGN_OUT);
     RemoveAddUserMenuOption();
-    WmShell::Get()->system_tray_delegate()->SignOut();
+    WmShell::Get()->system_tray_controller()->SignOut();
   } else if (sender == user_card_view_ &&
              IsMultiProfileSupportedAndUserActive()) {
     if (IsActiveUser()) {
       ToggleAddUserMenuOption();
     } else {
       RemoveAddUserMenuOption();
       SwitchUser(user_index_);
       // Since the user list is about to change the system menu should get
       // closed.
       owner_->system_tray()->CloseSystemBubble();
@@ skipping 261 matching lines @@
   focus_manager_ = nullptr;
   if (user_card_view_->GetFocusManager())
     user_card_view_->GetFocusManager()->ClearFocus();
   popup_message_.reset();
   mouse_watcher_.reset();
   add_menu_option_.reset();
 }
 
 }  // namespace tray
 }  // namespace ash